Multi-functional fire-proof gas safety valve

Abstract

A multi-functional fire-proof gas safety valve is applied to a gas home-entry pipeline and accordingly the defects of the existing safety valve are overcome. The multi-functional fire-proof gas safety valve comprises a front valve body and a rear valve body; a magnet valve core assembly which slides axially and a super-flow protector are arranged in the front valve body; a manual outer magnetic ring is arranged outside the front valve body; a pop-up core pipe is arranged in an inner chamber of the rear valve body; the core pipe comprises an air guide channel which is connected with the front valve body; the front end of the core pipe is connected with the front valve body; a sliding sleeve is arranged outside the rear valve body; temperature sensing memory alloy and a sleeve reset pressure spring are arranged between the sleeve and the rear valve body; the rear valve body is provided with a locking bead or a locking pin; the outer circumferential surface of the core pipe is provided with a locking hole or a locking ring groove; the inner circumferential surface of the sleeve is provided with a release groove or a release ring chamber which is used for radially releasing the locking bead or the locking pin through the sleeve; a temperature control air guide hole is formed in the inner chamber of the rear valve body; a sealing cover base is arranged in the temperature control air guide hole; the rear end of the sealing cover base is provided with a sealing cover; a pushing and pressing spring is arranged between the sealing cover and an installing base. According to the multi-functional fire-proof gas safety valve, three functions of overpressure control, overflow control and over-temperature control are integrated into a whole, the safety valve does not need to be replaced after the high temperature, and the economical efficiency is good.

Description

Technical field [0001] The patent of the invention belongs to the field of gas valves and is a gas safety valve. Background technique [0002] With the development of society, natural gas has entered every household as a fuel and has become an indispensable energy source for daily life; due to its own flammable and explosive nature, a slight improper use may cause fire accidents, and The harmful consequences are generally more serious. to this end. The safe use of gas at users has always been a technical subject of concern in this field. The manual gas safety valves used in the early days are all installed at the end of the pipeline. Once a fire occurs, they cannot be controlled and are useless. Recently, it has been developed to install an electromagnetic flowmeter in front of the manual safety valve to carry a leak-proof closing function, but this type of valve is mostly composed of electronic components. Because electronic components are susceptible to various environmenta...

AI Technical Summary

Problems solved by technology

The manual gas safety valves used in the early days were all installed at the end of the pipeline. Once a fire broke out, they could not be controlled and were useless.

Recently, it has been developed to install an electromagnetic flowmeter in front of the manual safety valve, which has the function of leak-proof closing. Possibility of electricity, poor fire prevention and control function

Recently, a gas safety self-closing valve has appeared, which has dual functions of gas control and temperature sensing. Although it can be controlled without power supply and can automatically close the pipeline under the condition of overpressure and overflow in the pipeline, its temperature sensing function can only be activated. Once, the product is directly scrapped and cannot be reused after one action, and there are practical defects, such as Chinese patent 201120316987.X, which is the second case

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